United Nations. Economic and Social Council; United Nations. Economic Commission for Africa; UN. ECA Regional on Youth Employment and National Development Meeting (1968, May 21 - 30: Niamey, Niger.)(1968-04)

United Nations. Economic and Social Council; United Nations. Economic Commission for Africa; UN. ECA Regional on Youth Employment and National Development Meeting (1968, May 21 - 30: Niamey, Niger.)(1968-03)